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arXiv 1701.03239hep-th
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欧几里德规范理论中的Gribov视界和鬼相互作用

The Gribov Horizon and Ghost Interactions in Euclidean Gauge Theories

Hirohumi Sawayanagi

摘要:

研究了欧氏$SU(2)$规范理论中Gribov视界的影响。格里波夫视界上的规范场产生零模的鬼和反鬼。我们证明了这些零模可以产生额外的鬼相互作用,朗道规范有效地转变为非线性规范。然而,在红外极限,朗道规范恢复,鬼零模可能再次出现。结果表明,在非线性规范场中存在鬼凝聚,零模重复现象得以避免。

英文摘要:

The effect of the Gribov horizon in Euclidean $SU(2)$ gauge theory is studied. Gauge fields on the Gribov horizon yield zero modes of ghosts and anti-ghosts. We show these zero modes can produce additional ghost interactions, and the Landau gauge changes to a nonlinear gauge effectively. In the infrared limit, however, the Landau gauge is recovered, and ghost zero modes may appear again. We show ghost condensation happens in the nonlinear gauge, and the zero mode repetition is avoided.

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